Tam O' the Scoots by Edgar Wallace

There comes to every great artist a moment when a sense of the futility of his efforts weighs upon and well-nigh crushes him. Such an oppression represents the reaction which follows or precedes much excellent work. The psychologist will, perhaps, fail to explain why this sense of emptiness so often comes before a man's best accomplishments, and what association there is between that dark hour of anguish which goes before the dawn of vision, and the perfect opportunity which invariably follows.

Sergeant-Pilot Tam struck a bad patch of luck. In the first place, he had missed a splendid chance of catching von Rheinhoff, who with thirty-one "crashes" to his credit came flaunting his immoral triumph in Tam's territory. Tam had the advantage of position and had attacked -- and his guns had jammed. The luck was not altogether against him, for, if every man had his due, von Rheinhoff should have added Tam's scalp to the list of his thirty-one victims.